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LG 22LN4060, Service Manual

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LG 22LN4060 Service Manual Download Page 14

- 14 -

LGE Internal Use Only

Copyright  © 

  LG Electronics. Inc. All rights reserved.

Only for training and service purposes

5. Abnormal screen (AV)-Main PCBA

Put into AV cable completely?

Abnormal screen (AV)

YES

NO

NO

Insult AV cable tight

1

Change IC501

WAVEFORMS

Is Input signal timing 

and format in spec?

Change Timing to 480I, 576I 

Or change format CVBS

2

Is waveform at R505

3

Check Line between JK101 and IC501

is open or short,  Another is 

change AV cable

NO

YES

YES

R505 (CVBS)

3

Summary of Contents for 22LN4060

Page 1: ...MANUAL North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Internal Use Only CHASSIS LM91P MODEL 22LN4060 22LN4060 TB CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL ...

Page 2: ...nc All rights reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 7 TROUBLE SHOOTING GUIDE 10 BLOCK DIAGRAM 18 EXPLODED VIEW 19 SCHEMATIC CIRCUIT DIAGRAM ...

Page 3: ...inals etc to be sure the set is safe to operate without damage of electrical shock Leakage Current Cold Check Antenna Cold Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm meter lead in turn to each exposed m...

Page 4: ...ctrostatic charge on your body by touching a known earth ground Alter natively obtain and wear a commercially available discharg ing wrist strap device which should be removed to prevent potential shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent e...

Page 5: ...he solder joints of the two original leads If they are not shiny reheat them and if necessary apply additional solder Fuse and Conventional Resistor Removal Replacement 1 Clip each fuse or resistor lead at top of the circuit board hollow stake 2 Securely crimp the leads of replacement component around notch at stake top 3 Solder the connections CAUTION Maintain original spacing between the replace...

Page 6: ...rts are followed each drawing and specification by part number in accordance with BOM 5 The receiver must be operated for about 5 minutes prior to the adjustment 3 Test method 1 Performance LGE TV test method followed 2 Demanded other specification Safety CE IEC specification EMC CE IEC 4 Model General Specification HDMI 1 4 with Deep Color is only apply for FHD Model No Item Specification Remarks...

Page 7: ...l Dynamic range and data one of R G B is fixed at 192 and the other two is lowered to find the desired value 3 Adj condition normal temperature 1 Surrounding Temperature 25 C 5 C 2 Warm up time About 5 Min 3 Surrounding Humidity 20 80 4 Before White balance adjustment Keep power on status don t power off 3 1 2 Adj condition and cautionary items 1 Lighting condition in surrounding area surrounding ...

Page 8: ...per countries 1 Press IN START key at Factory Service remote control 2 Select Tool Option 1 3 Punch in the number and press OK Each of models has their number 4 Correct Tool Option2 Tool Option5 5 Completed adjusting Tool option 5 Ship out mode check In stop After final inspection press In Stop key of the Adjustemnt Remote Control and check that the unit goes to Stand by mode 6 AUDIO output check ...

Page 9: ...ion in surrounding area surrounding lighting should be lower 10 lux Try to isolate adj area into dark surrounding 2 Probe location Color Analyzer CA 210 probe should be within 10cm and perpendicular of the module surface 80 100 3 Aging time 1 After Aging Start Keep the Power ON status during 5 Minutes 2 In case of LCD Back light on should be checked using no signal or Full white pattern 9 1 2 Equi...

Page 10: ...s of IC701 If there is any problem at Line Change IC701 NO Check Line short or open between IC501 and X501 Change IC501 or change X501 1 2 4 Is 1 8V at C745 is 1 25V at C742 3 YES check the Lines of IC711 IC704 If there is any problem at Line Change IC704 IC711 NO Insert F W is 3 3V at 1pin of P120 when push power key Is 0v at 2pin of P120 Change control Or check Line short or open of P120 5 is th...

Page 11: ...t at Line and wafer between IC704 IC711 and IC600 If there is any problem at Line Change IC704 IC711 or IC501 1 2 is 3V at 3pin of IC801 YES It is not over 3V at 1pin of IC801 Change Q802 Or check Line short or open between R803 and 95pin of IC501 Change IC 501 4 3 NO check open or short at Line or change Adapter is 12V at 1pin of P101 If is not under 1 5V at R720 change Q721 or check open and sho...

Page 12: ...NO YES If LVDS cable isn t insulted enough Insult LVDS cable until locking hook If LVDS cable have damage Change LVDS cable 1 Change module WAVEFORMS 3 Is 12V at 1pin of P101 If is not under 1 5V at R722 change Q721 or check open and short of Line among Q720 and Q721 If is under 11V at L110 Check open and short Of line between L110 and P101 2 3 NO Check open and short Of line between Q720 and P101...

Page 13: ...m At 3 4pin of TU401 3 4 Is IF waveform at 43 44 pin of IC501 NO NO 3 3Pin of TU401 SCL 4Pin of TU401 SDA 4 43 44pin of IC501 If 1 7V is not at plus pin of TU401 check It is over 3V at 2pin of IC401 if it is not Check Line between TU401 and IC401 is open or short Another is change IC401 or TU401 Check Line between TU401 and IC501 is open or short Another is change IC501 or TU401 Check Line between...

Page 14: ...AV Main PCBA Put into AV cable completely Abnormal screen AV YES NO NO Insult AV cable tight 1 Change IC501 WAVEFORMS Is Input signal timing and format in spec Change Timing to 480I 576I Or change format CVBS 2 Is waveform at R505 3 Check Line between JK101 and IC501 is open or short Another is change AV cable NO YES YES R505 CVBS 3 ...

Page 15: ...IC301 If 3V is not plus 30pin of IC301 check It is over 3V at L301 if it is not Check Line between L301 and IC301 is open or short Another is change IC701 IC301 NO 3 4 YES Is I2C waveform at 10 11pin of IC301 Check Line between IC301 and IC501 is open or short Another is change IC301 or IC501 NO 5 Is I2S waveform at R301 R302 R303 R304 6 Check Line between IC301 and IC501 is open or short Another ...

Page 16: ...8V at 7pin of TU401 Is I2C waveform At 3 4pin of TU401 Is IF waveform at 43 44 pin of IC501 NO NO 3 3Pin of TU401 SCL 4Pin of TU401 SDA 4 43 44pin of IC501 If 1 7V is not at plus pin of TU401 check It is over 3V at 2pin of IC401 if it is not Check Line between TU401 and IC401 is open or short Another is change IC401 or TU401 Check Line between TU401 and IC501 is open or short Another is change IC5...

Page 17: ...ning and service purposes 8 Abnormal sound AV Main PCBA Put into AV cable completely Abnormal sound AV YES NO Insult AV cable tight 1 Change IC501 WAVEFORMS Is waveform at C520 C521 2 Check Line between JK101 and IC501 is open or short Another is change AV cable NO YES C520 C521 audio in 2 ...

Page 18: ...DS Output P Dim Inv ON P_ST 3 5V M_3 3V TU_3 3V 12 19V Main_1 2V 18V 10 11 7 8 9 38 I2S_MCLK I2S_WS I2S_SCK I2S_SDO 108 111 117 IR KEY1 Led_PWR 102 105 53 52 45 85 84 EEP SDA EEP SCL 94 95 97 96 SPI_CLK SPI_DI SPI_CZ SPI_DO S_AMP_19V 32 40 LPF USB_5V 110 KEY2 ST_3 5V P_12V Q710 Main_1 8V M_3 3V Q720 AO3407A Panel_Vcc Main_5V To USB USB_DN USB_DP IF_P IF_N 31 35 1 8V REG 7 TU_1 8V 19 20 Audio out 2...

Page 19: ... mechanical parts in this chassis have special safety related characteristics These parts are identified by in the Schematic Diagram and EXPLODED VIEW It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X RADIATION Shock Fire or other Hazards Do not modify the original design without permission of manufacturer IMPORTA...

Page 20: ...110 10K READY R111 10K R126 10K R127 10K READY R129 10K R128 10K READY C124 1000pF 50V RXA3 RXA2 RXA1 RXA3 RXA0 RXA2 RXA1 RXACK RXACK RXA0 RXA1 RXA3 RXA2 RXA0 RXA3 RXA0 RXACK RXA1 RXA2 RXACK VLCD VLCD L110 UBW2012 121F R108 1K MUTE_AOUT R101 75 R102 220K JP103 JP104 MNT_LOUT R104 12K AUDIO_LIN Q103 MMBT3904 NXP E B C JK101 PPJ234 03 5A RD1 O SPRING 6A RD1 E LUG 4A RD1 CONTACT 7B WH1 E LUG S 5B WH1...

Page 21: ...EMETIC INPUT2 JP209 JP211 JP210 5V_USB JP208 USB_DP USB_DN JK205 PEJ034 01 6B T_TERMINAL2 7B B_TERMINAL2 5 T_SPRING 4 R_SPRING 3 E_SPRING JP214 JP212 DSUB_SCL DSUB_SDA D223 20V READY JP213 D222 20V READY C221 22uF 10V L220 UBW2012 121F ZD220 READY 20V ZD221 READY 20V JK202 US 04A VSD 1 2 3 4 5 2 8 INPUT2 Close to SIDE_USB USB I2C Control EAX65303201 LN4050 2012 12 18 Copyright 2013 LG Electronics ...

Page 22: ...18PG121SN1D 3 3V_M R304 100 L304 10uH L305 10uH L303 10uH L306 10uH POWER_DET IC301 NTP7513 3 DGND_PLL 2 VDD_PLL 4 GND 1 AGND_PLL 6 DVDD 5 DGND 7 SDATA 8 WCK 9 BCK 10 SDA 11 SCL 12 FAULT 13 MONITOR_0 14 MONITOR_1 15 MONITOR_2 16 BST2B 17 PGND2B 18 OUT2B 19 PVDD2B 20 PVDD2A 21 OUT2A 22 PGND2A 23 BST2A 24 VDR2 25 AGND 26 VCC5 27 VDR1 28 BST1B 29 PGND1B 30 OUT1B 31 PVDD1B 32 PVDD1A 33 OUT1A 34 PGND1A...

Page 23: ...1 DIF N 2 RESET 10 DIF P 4 SDA 1 NC_1 9 IF_AGC 8 NC_3 3 SCL 7 B2 1 8 6 NC_2 12 SHIELD A1 A1 B1 B1 C411 0 1uF 16V R404 100K R412 100 R414 10 PAL C412 10uF 16V C407 10uF 16V C408 0 1uF 16V C401 0 1uF 16V R411 1 C405 0 1uF 16V 3 3V_TU IF_P 3 3V_TU R408 2 2K 1 16W 5 TUNER_SCL TUNER_SDA R405 33 R406 33 C404 22uF 10V R401 0 READY R410 1 1 10W C410 0 1uF 16V 100pF C406 50V 3 3V_M R414 1 0 NTSC R413 10 PA...

Page 24: ...C1 26 CVBS1 27 CVBS0 28 VCOM 29 CVBSOUT1 30 AVDD_AU33 31 AUREF 32 VAG 33 LINEIN_L1 34 LINEIN_R1 35 LINEIN_L3 36 LINEIN_R3 37 LINEOUTL3 38 LINEOUTR3 39 XTALO 40 XTALI 41 AVDD3P3_DMPLL 42 AVDD3P3_DADC 43 VIFP 44 VIFM 45 IFAGC 46 VSS 47 AVDD_DDR 48 GPIO55 I2S_OUT_WS 49 GPIO56 50 GPIO57 I2S_OUT_BCK 51 GPIO58 I2S_OUT_SD 52 GPIO60 53 GPIO61 54 VDDP 55 VDDC_1 56 LVA4P 57 LVA4M 58 LVA3P 59 LVA3M 60 LVACLK...

Page 25: ... 16V IC704 AP7173 SPG 13 HF DIODES 3 VCC 2 PG 4 EN 1 IN 5 GND 6 SS 7 FB 8 OUT 9 EP C712 0 1uF 25V C715 0 1uF 25V C771 0 1uF 25V C779 0 1uF 25V C781 0 1uF 25V C774 0 33uF 16V READY R716 7 5K L761 UBW2012 121F C753 4 7uF 10V R762 22K R761 22K C760 1uF 35V R727 0 C723 220pF 50V C724 150pF 50V READY IC702 MP1584EN 3 COMP 2 EN 4 FB 1 SW 5 GND 6 FREQ 7 VIN 8 BST 9 EP GND D721 40V SMAB34 C727 0 1uF 25V L...

Page 26: ...JP803 POWER_SW R807 51K JP804 R820 100 READY Q802 MMBT3904 NXP E B C R821 0 READY PWM_DIM R808 0 1 1W R802 10K JP802 Q801 AOD478 S D G C802 10uF 25V R805 470K R813 30K 19V 3 5V_ST C806 2200pF 50V C809 0 1uF 16V C807 47pF 50V 24V_BLU R804 10K READY C803 0 1uF 25V READY R825 100 R814 10 C821 0 1uF 25V R822 4 7K READY C816 270pF 50V R803 100K R811 5 6 C817 10uF 25V C815 47uF 25V L801 33uH D801 PDS510...

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